package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
@Service
@Slf4j
public class UserServiceImpl implements UserService {
    private static final String WX_LONGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * 用户登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //通过调用微信接口服务，获取用户的openid
        String code = userLoginDTO.getCode();
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空，如果空就返回登录失败，否则成功
        if (openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断是否为新用户
        User user=userMapper.getByOpenId(openid);
        //如果时新用户 自动注册
        if (user==null){
            user=new User();
            User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);

        }

        //返回这个用户对象

        return user;
    }

    /**
     * 调用微信接口服务，获取用户的openid
     * @param code
     * @return
     */
    private String getOpenid(String code) {
        Map map=new HashMap();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LONGIN, map);
        log.info("微信登录返回结果：{}", json);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
